Impediments and hindrances for urban runoff management in the context of rapid urban growth:a case study of Kasetsart University, Bangkhen Campus
Keywords:
urban stormwater management, localized flooding, localized flood risk, stormwater institutional arrangementAbstract
Rapid urban development, lack of stormwater drainage system as well as inefficient urban stormwater and flood management contribute to localized flooding. This paper aims to find out the impediments of urban stormwater management in the low lying area where rapid urban growth is prominent by using Bangkhen campus of Kasetsart university as a case study area. This study utilizes a qualitative research method technique via document analysis and purposive sampling interview to identify the administrative structure and hindrances of stormwater management. The study results reveal the influence of stormwater detention and drainage capacity upon the flood characteristic occurred in the campus area after raining. Factors underlying the campus localized flooding include disconnected water network and disappeared water bodies caused by land use change and flood prone area caused by new built up area development. Drivers of those mentioned factors are non-conformed developments with the campus master plan and isolation between land use planning and stormwater drainage management. Empirical evidences within this study confirm that not only the efficiency of stormwater drainage system but also the policy of land use affects the characteristics of urban stormwater and flood management. It is recommended that the university should keep the current data of the campus physical planning up to date and raise public awareness of conserving green open space as well as water bodies within the campus area. The university should establish the administrative mechanism that allow the informational exchange of land use policy and stormwater drainage management among the University Physical Development Committee, Campus Master Planning Division, and Vehicle Building and Physical Plant Division. This would lead to the campus physical planning management that is responsive to changes and can reduce the risks of local flooding in a long term.
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